Highlight Sync by fazorboy

Features

| Feature | Description |
|---------|-------------|
| Web Highlighting | Select text on any page → pick color → auto-save |
| Local-First Storage | All data in IndexedDB — no cloud required |
| Tags & Search | Tag highlights by topic, full-text search |
| Spaced Repetition | Daily review digest using SM-2 algorithm |
| Multi-Format Export | Markdown, CSV, JSON, Obsidian, Notion, Anki |
| Optional Sync | GitHub Gist (free) or self-hosted endpoint |
| Cross-Browser | Chrome + Firefox (Manifest V3) |
| Privacy-First | Zero analytics, zero tracking, fully open-source |

Usage

1. Highlight text — Select text on any page → floating color toolbar appears → click a color
2. Keyboard shortcut — Ctrl+Shift+H (Windows/Linux) or Cmd+Shift+H (Mac) to highlight with default yellow
3. Right-click — Select text → right-click → "Highlight Selection" → pick color
4. Search — Click extension icon → Search tab → type to search across all highlights
5. Tags — Click extension icon → Tags tab → create and manage tags
6. Review — Click extension icon → Review tab → review highlights with spaced repetition
7. Export — Click extension icon → Export tab → choose format and download
8. Sync — Click extension icon → Settings tab → configure GitHub Gist or self-hosted sync

Export Formats

| Format | Details |
|--------|---------|
| Markdown | Grouped by page/date/tag with metadata |
| Obsidian | Frontmatter YAML, > [!quote] callouts, [[wikilinks]] |
| Notion | Notion-compatible markdown with database properties |
| Anki | Tab-separated: front=context, back=highlight |
| CSV | Standard CSV with all fields |
| JSON | Raw JSON array for custom processing |

Sync Options

| Provider | How It Works |
|----------|-------------|
| GitHub Gist | Stores highlights as JSON in a private gist (free, encrypted PAT) |
| Self-hosted | POST/GET to your REST endpoint (HTTPS required) |
| None | Fully local — zero network requests |